兰州交通大学学报
蘭州交通大學學報
란주교통대학학보
JOURNAL OF LANZHOU JIAOTONG UNIVERSITY（Natural Sciences）
2014年
3期
150-155
,共6页
桥梁结构%三维建模%ObjectARX%图形变换%布尔运算
橋樑結構%三維建模%ObjectARX%圖形變換%佈爾運算
교량결구%삼유건모%ObjectARX%도형변환%포이운산
bridge structure%three-dimensional modeling%ObjectARX%graphic transformation%Boolean operations
对拱桥结构特点进行分析，依据构造实体几何法理论，提出三维图形变换结合二维面域推移生成三维实体的建模方法，利用 Visual C＋＋和 ObjectARX 工具，通过建模参数，创建封闭图形区域和推移路径，由推移表示法形成桥梁等截面或变截面结构立体，运用平移和镜像等变换方法组装整桥，并以拱桥建模为例实现参数化三维建模，为桥梁三维建模提供新的思路。
對拱橋結構特點進行分析，依據構造實體幾何法理論，提齣三維圖形變換結閤二維麵域推移生成三維實體的建模方法，利用 Visual C＋＋和 ObjectARX 工具，通過建模參數，創建封閉圖形區域和推移路徑，由推移錶示法形成橋樑等截麵或變截麵結構立體，運用平移和鏡像等變換方法組裝整橋，併以拱橋建模為例實現參數化三維建模，為橋樑三維建模提供新的思路。
대공교결구특점진행분석，의거구조실체궤하법이론，제출삼유도형변환결합이유면역추이생성삼유실체적건모방법，이용 Visual C＋＋화 ObjectARX 공구，통과건모삼수，창건봉폐도형구역화추이로경，유추이표시법형성교량등절면혹변절면결구입체，운용평이화경상등변환방법조장정교，병이공교건모위례실현삼수화삼유건모，위교량삼유건모제공신적사로。
Based on the analysis of structural features of arch bridges and constructive solid geome-try,the modeling method of combining three-dimensional graphics transformation with two-di-mensional region sweeping is presented for generating three-dimensional solids.Closed graphic re-gion and sweep path are created by utilizing Visual C++,ObjectARX and modeling parameters. The solid components of constant section and variable cross-section are then formed by sweep rep-resentation.Finally,the whole arch bridge is erected by a series of transformation methods inclu-ding move and mirror.An example of bow-string arch bridge is proposed to illustrate the modeling process,which provides reference for similar practices.
